It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "A slave who obeys Allah and also obeys his masters, Allah will admit him into Paradise seventy years before his masters. The master will say: 'O my Lord, this one was my slave in the world!' Allah will say: 'I have rewarded him for his deeds, and I have rewarded you for your deeds.'"
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12749